Bifunctional core–shell co-catalyst for boosting photocatalytic CO_(2) reduction to CH_(4)

作     者：Fangxu Dai Mingming Zhang Jishu Han Zhenjiang Li Shouhua Feng Jun Xing Lei Wang 

作者机构：Key Laboratory of Eco-chemical EngineeringMinistry of EducationCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China College of Materials Science and EngineeringQingdao University of Science and TechnologyQingdao 266042China College of Environment and Safety EngineeringQingdao University of Science and TechnologyShandong Engineering Research Center for Marine Environment Corrosion and Safety ProtectionQingdao 266042China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2024年第17卷第3期

页      面：1259-1266页

核心收录：

学科分类：07[理学] 070304[理学-物理化学(含∶化学物理)] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(Nos.51802171,52072197,and 52003136) the Outstanding Youth Foundation of Shandong Province,China(No.ZR2019JQ14) the Youth Innovation and Technology Foundation of Shandong Higher Education Institutions,China(No.2019KJC004) the Major Scientific and Technological Innovation Project(No.2019JZZY020405) Taishan Scholar Program,and the Major Basic Research Program of Natural Science Foundation of Shandong Province(No.ZR2020ZD09). 

主　　题：bifunctional co-catalyst core–shell photocatalytic CO_(2)reduction 

摘      要：Solar-light-driven CO_(2) reduction CO to CH_(4) and C2H6 is a complex process involving multiple elementary reactions and energy barriers.Therefore,achieving high CH_(4) activity and selectivity remains a significant challenge.Here,we integrate bifunctional Cu2O and Cu-MOF(MOF=metal-organic framework)core–shell co-catalysts(Cu2O@Cu-MOF)with semiconductor TiO_(2).Experiments and theoretical calculations demonstrate that Cu2O(Cu+facilitates charge separation)and Cu-MOF(Cu2+improves the CO_(2) adsorption and activation)in the core–shell structure have a synergistic effect on photocatalytic CO_(2) reduction,reducing the formation barrier of the key intermediate*COOH and*CHO.The photocatalyst exhibits high CH_(4) yield(366.0μmol·g^(-1)·h^(-1)),efficient electron transfer(3283μmol·g^(-1)·h^(-1))and hydrocarbon selectivity(95.5%),which represents the highest activity of Cu-MOF-based catalysts in photocatalytic CO_(2) reduction reaction.This work provides a strategy for designing efficient photocatalysts from the perspective of precise regulation of components.